with shards of metal, nails and ball bears. todaypresidentobama--ball bearings. todaypresidentobamacalledthe attacks heinous and promised justice. the president said the fbi is treating the attacks as an act of terrorism. >> any time bombs are used to target innocent civilians. , it's an act of -- civilians, it's an act of terror. we don't know who carried out this attack or why, whether it was planned and executed by a terrorist organization, foreign or domestic, or was the act of a mal lev lent -- malevolent individual. that's what we don't know. we're at the beginning of our investigation. we'll take time to follow every lead and determine what happened. but we will find out. >> the president ordered flags at the white house and all government buildings to be flown at half-staff in honor of the bombing victims. >>> tips are pouring into the fbi as the joint terrorism task force pieces together what happened and why. ktvu sea 's alex savidge is in our newsroom with more. >> well, "the associated press" reported the two bombs were made out of pressure cookers packed with metal, b

involving the poison ricin. one letter was sent topresidentobama. anotherto a u.s. senator. this morning a suspicious package trigger add lockdown on capitol hill. scott mcfarland joins us now with word the lockdown has now been lifted. scott? >> reporter: just a short while ago, janet, not just a suspicious package but two suspicious letters tested as well, -- letters as well, all tested, all cleared. police officers and explosive sniffing dogs outside and inside the entrances on capitol hill. you can also see a hazardous materials truck there. lights flashing near the u.s. senate russell building. the third floor of the building locked down for a while today, including a hallway with the offices of pennsylvania democratic senator bob casey. >> there was a letter on this floor that was delivered that apparently is no longer a concern about, but in the interest of being careful, they shut down a corridor. >> reporter: in the past 24 hours, two other letters have reportedly tested positive for a poison called ricin, one addressed to president owe bam. another -- president obama, another t

injury in the bombing. first ladymichelleobamaalsovisited aaron at the hospital last week. tonight runners in marin county will do their part to honor the victim's of the boston bombings. they will run in a special 2.5- mile race that begins at 6:45 p.m. at ross common park. runners are encouraged to wear blue and yellow clothing. the bombings in boston have renewed the debate about surveillance camera on public streets. rob ross is in san francisco where the police chief is floating the idea of installing the cameras on a major thorough fair there. >> reporter: good afternoon. police chief greg suhr says he hopes to take early lessons he is learning from the bombing and apply them here on market street. we talked to the chief less than an hour ago. he is floating an idea to install police security camera. [please stand by for captioner change] suhr is proposing having police monitor cameras at large events. >> i think you first have to start off with a plan. we need some sort of engineer to tell us what would work and this we need to find out what is most efficient and go from the

. >> not here in boston. [ applause ] >>presidentobamasaysthe terrorists picked the wrong city if he wanted to scare and shake the people of boston. good afternoon, i am john sasaki in for tori campbell. two days after the devastation in boston a explosion at a fertilizer plant in texas killed and injured many. it happened at a town near dallas. sal castaneda joins us with more. >> reporter: the explosion is blamed for the deaths of between 5 and 15 people according to authorities. the explosion's violent force was captured in this amateur video. watch closely as it quickly goes from bad to worse. >> -- sure the -- [ explosion ] >> officials say the explosion did not happen until nearly a half-hour after the initial fire. emergency responders already on the scene are among some of the missing feared dead. the scene is in the small community of west, texas, about an hour and a half south of dallas, it is near waco. the fertilizer plant had tank of anhad druse ammon ammonia, today the search continues. >> it is a slow methodical search and they are using every available resource they have t

the two men have been cleared by investigators. >>> a couple of hours ago members oftheobamanessadministrationtoured a warehouse training facility in richmond. it highlighted the relationship between community colleges and employers when it comes to building a strong work force. during the visit the labor department announced more than 474 million dollars in grant money is available to workers for in demand high growth occupations. >> we will bring more jobs to the united states. we will help more entrepreneurs to build homegrown businesss that create even more jobs right here in the east bay and across the united states. >> the warehouse facility is operated by contra costa college, the richmond work force investment board and san pablo economic development corporation. >> a few minor changes to our forecast for today but still have plenty of sunshine, lots of clear skies, a few high clouds paying us a visit right now. here is our camera looking toward the bay bridge. see some of those high clouds in the distance over mt. diablo but still lots of sunshine today and into the we

that appeared from "the associated press" said "breaking -- two explosions in the white house andbarackobamaisinjured." the tweet was fake. the a.p. twitter account was hacked. the president's fine and there are no explosions. within minutes, the a.p. suspended its account. it released a statement saying the account had been hacked and the tweet about the white house was false. that's at about 10:12. between the hack statement and the tweet, the dow jones fell over 150 points. also markets went down. by 10:13, stock, bonds and crude oil were all trading before about where they were before the tweet. the dow is back up 123 points at 14,691. the nasdaq is up 30. s&p is up 13. >>> budget headaches strike again in contra costa county. four fire stations were shut down earlier this year and now two more could be on the chopping block. we mentioned the story on "mornings on 2" today. new at noon, sal castanedo joins us live with ri action to the possible closures -- live with the reaction to the possible closures. >> reporter: good afternoon. you may see fewer staff and stations open if the budg